Strip fastener

A fastener adapted to releasably fix a first element and a second element, the fastener including:

• a channel having defined by two strips, each strip comprising a plurality of spaced lockers forming opposed walls of the channel, the lockers being pivotable into the channel;
• a locking tongue having a plurality of spaced blockers and a base which forms the base of the channel, the tongue slides within the channel between a locked position, in which the blockers register with the lockers to prevent movement of the lockers into the channel, and an unlocked position in which the blockers are moved out of register with the lockers such that the lockers are not prevented from moving into the channel, wherein the locking tongue is caused to slide between the locked position and the unlocked position by a shape memory alloy strip material adapted to contract when activated;
• wherein the material adapted to contract when activated is shape memory alloy strip.